When it comes to precision hunting, the choice of optic can greatly influence your success in the field. Among the many options available, second focal plane (SFP) optics stand out for their unique properties. Understanding how does a second focal plane optic work and using it effectively can help you enhance your shooting accuracy, especially for hunting in diverse environments. In this article, we’ll break down the key aspects of hunting with a second focal plane optic and share practical tips to help you get the most out of your setup.
A second focal plane optic means that the reticle remains the same size, regardless of magnification. This differs from a first focal plane (FFP) optic, where the reticle size changes with magnification. The reticle of an SFP scope only holds its subtension (the space between the reticle’s hash marks) at the scope's highest magnification setting. This aspect is crucial for hunters, as it affects how they judge distance and bullet drop at different magnifications.
One major advantage of using a second focal plane optic is that the reticle remains easy to read, even at lower magnifications. This is helpful in hunting scenarios where you may not need maximum magnification. However, the challenge comes when you adjust magnification—your reticle’s subtensions will no longer be accurate unless you are at full power.
Reticle size remains consistent.
Accurate subtensions only at full magnification.
Easier for quick target acquisition at lower magnifications.
When you’re moving through the field, always keep your magnification at its lowest setting. This allows for quick shots on game that may appear suddenly at close range. At high magnification, your field of view narrows, making it harder to acquire your target in time.
At full magnification, your subtensions will be accurate. For example, in a 6-24x scope, if the subtension is set to 1 minute of angle (MOA) at 24x, then at 12x magnification, it will double to 2 MOA. This means your bullet drop and windage adjustments will change. Always know how much your subtensions shift as you lower magnification.
Many experienced hunters, like the author of the referenced video, prefer using their scope at half magnification. This allows for a balance between magnification and field of view, giving you enough detail while allowing you to track your game more effectively after the shot.
Before going out on a hunt, practice shooting at various magnifications. This will help you become familiar with how your scope reacts to changes in magnification, allowing you to predict where your shot will land when you switch from full to half power.
In a live demonstration using a 6-24x Zeiss Conquest V4 optic, it was shown that at full magnification (24x), holding at 1 MOA resulted in a precise hit. When magnification was dropped to 12x, holding at the same 1 MOA resulted in a shot that was off by 2 MOA. This emphasizes the importance of understanding your subtensions when adjusting magnification in the field.
Hunting with a second focal plane optic offers flexibility and consistency in reticle size, but it also demands a solid understanding of how magnification affects your subtensions. By practicing with your scope at various power settings and knowing how to adjust on the fly, you’ll be better prepared for any hunting scenario. Whether you’re hunting deer, elk, or other game, mastering your SFP optic will give you the edge you need for accurate shots, no matter the conditions.
By following these tips, you’ll be well on your way to improving your hunting precision and getting the most out of your second focal plane optic.
